Which CMS. Input Please. I am lost

I really don’t get CMS but I am starting a new web page and have heard they make web page design much quicker and faster. However I don’t want a forum or build community. I simple want to be able have a template or directory style list at side and use the software to add a new page, then have the site directory or navigation update and the new page added. More of a page builder type thing than build a community. I found these offered by no idea what to use. I have looked at the web page for these software but they all look like communities and not something to run web page. Any input would be greatly appreciative.